Training bag



FIG. 1 is a perspective view of a training bag showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a right view thereof.

The portions shown in dotted lines depict environmental structure that forms no part of the claimed design. 

The ornamental design for a training bag, as shown and described. 